Question

In the spring of 2008, petrol cost £1.029 per litre in london. On the same day, the exchange rate was $1 = £0.485. What was the price of london petrol in dollars ($) per gallon? (1 gal = 3.7854 l) $8.03 /gal $1.89 /gal $7.80 /gal $1.78 /gal $3.90 /gal

Answer 1

The correct option is : $8.03/gal.

Step-by-step explanation

In the spring of 2008, petrol cost £1.029 per liter in London and the exchange rate was $1 = £0.485

So, £1.029 =
`(1.029)/(0.485) dollar = 2.1216.... dollar`

Also, 1 gallon = 3.7854 liters

So, 1 liter =
`(1)/(3.7854) gallon= 0.2641.....gallon`

Now, £1.029 per liter =
`(2.1216...)/(0.2641...) dollars/gallon = 8.03 dollars/gallon`

Thus, the price of London petrol in dollars per gallon was $8.03/gal.